#include <SPI.h>

uint8_t spiRx[256]; // Array to store received data
volatile int spiRxIdx = 0;  // Index to track how many items are in spiRx
volatile int spiRxComplete = 0;  // Flag to indicate when data is ready for printing

char buffer[2048]; // Character buffer to store formatted data
int indexbuf = 0; // Track current position in buffer


#include "SPI2Slave_T4.h"


SPI2Slave_T4<&SPI2, SPI_8_BITS> mySPI;

//IntervalTimer SPI_transfer;

void setup() {
  Serial.begin(921600);
  SPI.end();
  SPI1.end();

  SPI2.begin();
  mySPI.begin();
  mySPI.swapPins(true);

  //SPI_transfer.begin(ReceiveData, 10);  // run every 10 microseconds

}

void loop() {
  if (spiRxComplete) {
    indexbuf = 0;
    for (int i = 0; i < spiRxIdx; i++) {
       indexbuf += snprintf(buffer + indexbuf, sizeof(buffer) - indexbuf, "%02X ", (unsigned int)spiRx[i]);
    }    
    // Print the formatted buffer at once
    Serial.println(buffer);
    
    // Reset for the next round of data
    spiRxComplete = 0;
    spiRxIdx = 0;
  }
  delayMicroseconds(1);
}

void ReceiveData() {
}